<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
    <meta name="description" content="Draw a frustum.">
    <meta name="cesium-sandcastle-labels" content="Development">
    <title>Cesium Demo</title>
    <script type="text/javascript" src="../Sandcastle-header.js"></script>
    <script type="text/javascript" src="../../../Build/CesiumUnminified/Cesium.js" nomodule></script>
    <script type="module" src="../load-cesium-es6.js"></script>
</head>
<body class="sandcastle-loading" data-sandcastle-bucket="bucket-requirejs.html">
<style>
    @import url(../templates/bucket.css);
</style>
<div id="cesiumContainer" class="fullSize"></div>
<div id="loadingOverlay"><h1>Loading...</h1></div>
<div id="toolbar"></div>
<script id="cesium_sandcastle_script">
function startup(Cesium) {
'use strict';
//Sandcastle_Begin
// Create the viewer.
var viewer = new Cesium.Viewer('cesiumContainer');
var scene = viewer.scene;

var positionOnEllipsoid = Cesium.Cartesian3.fromDegrees(-105.0, 45.0, 20.0);

var enu = Cesium.Transforms.eastNorthUpToFixedFrame(positionOnEllipsoid);
var rotation = Cesium.Matrix4.getMatrix3(enu, new Cesium.Matrix3());
Cesium.Matrix3.multiply(rotation, Cesium.Matrix3.fromRotationX(-Cesium.Math.PI_OVER_TWO), rotation);
var orientation = Cesium.Quaternion.fromRotationMatrix(rotation);

var frustum = new Cesium.PerspectiveFrustum({
    fov : Cesium.Math.toRadians(60.0),
    aspectRatio : scene.canvas.clientWidth / scene.canvas.clientHeight,
    near : 10.0,
    far : 50.0
});

var frustumGeometry = new Cesium.FrustumGeometry({
    frustum : frustum,
    origin : positionOnEllipsoid,
    orientation : orientation,
    vertexFormat : Cesium.VertexFormat.POSITION_ONLY
});

var frustumGeometryInstance = new Cesium.GeometryInstance({
    geometry : frustumGeometry,
    attributes : {
        color : Cesium.ColorGeometryInstanceAttribute.fromColor(new Cesium.Color(1.0, 0.0, 0.0, 0.5))
    },
    id : 'frustum'
});

var frustumPrimitive = scene.primitives.add(new Cesium.Primitive({
    geometryInstances : frustumGeometryInstance,
    appearance : new Cesium.PerInstanceColorAppearance({
        closed: true,
        flat : true
    })
}));
scene.primitives.add(new Cesium.Primitive({
    geometryInstances : new Cesium.GeometryInstance({
        geometry : new Cesium.FrustumOutlineGeometry({
            frustum : frustum,
            origin : positionOnEllipsoid,
            orientation : orientation
        }),
        attributes : {
            color : Cesium.ColorGeometryInstanceAttribute.fromColor(new Cesium.Color(0.0, 0.0, 0.0, 1.0))
        }
    }),
    appearance : new Cesium.PerInstanceColorAppearance({
        flat : true
    })
}));

frustumPrimitive.readyPromise.then(function(primitive) {
    var bs = primitive.getGeometryInstanceAttributes('frustum').boundingSphere;
    scene.camera.viewBoundingSphere(bs);
    scene.camera.lookAtTransform(Cesium.Matrix4.IDENTITY);
});
//Sandcastle_End
Sandcastle.finishedLoading();
}
if (typeof Cesium !== 'undefined') {
    window.startupCalled = true;
    startup(Cesium);
}
</script>
</body>
</html>
